php - Getting $_GET variable when using mod_rewrite -

i having issues getting $_get variables mod_rewrite enabled. have following .htaccess:

rewriteengine on rewriterule ^/?resource/(.*)$ /$1 [l] rewriterule ^$ /home [redirect] rewriterule ^([a-za-z]+)/?([a-za-z0-9/]*)$ /app.php?page=$1&query=$2 [l] 

and app.php is:

<?php require("controller.php"); $app = new controller(); 

and controller.php is:

<?php require("model.php"); require("router.php");  class controller{  //--------variables------------     private $model;     private $router; //--------functions------------      //constructor     function __construct(){         //initialize private variables         $this->model = new model();         $this->router = new router();          $page = $_get['page'];          //handle page load         $endpoint = $this->router->lookup($page);         if($endpoint === false) {             header("http/1.0 404 not found");         }else {             $this->$endpoint($queryparams);          }     }     private function redirect($url){         header("location: /" . $url);     }      //--- framework functions     private function loadview($view){         require("views/" . $view . ".php");     }     private function loadpage($view){         $this->loadview("header");         $this->loadview($view);         $this->loadview("footer");     }      //--- page functions     private function indexpage(){         $this->loadpage("home");     }     private function controlpanel(){         echo "query " . $code;         /*         if($this->model->set_token($code)){             $user = $this->model->instagram->getuser();         }else{             echo "there error generating instagram api settings.";         }         */         $this->loadpage("controlpanel");     }     private function autolike(){         $this->loadpage("autolike");     }     private function about(){         $this->loadpage("about");     } } 

so example of url might have /app.php?page=controlpanel&query=null rewritten /controlpanel. problem have have page sends form /controlpanel resulting in url /controlpanel?code=somecode.

what trying $_get['code'] , cannot seem this. can help? apologies in advance bit of code dump.

change

rewriterule ^([a-za-z]+)/?([a-za-z0-9/]*)$ /app.php?page=$1&query=$2 [l] 

to

rewriterule ^([a-za-z]+)/?([a-za-z0-9/]*)$ /app.php?page=$1&query=$2 [l,qsa] 

qsa append query string

from docs

"when replacement uri contains query string, default behavior of rewriterule discard existing query string, , replace newly generated one. using [qsa] flag causes query strings combined."